Why use Bt?
Bt products are considered nontoxic to humans, animals, fish, plants, other insects and microorganisms. Bt is highly selective; it only kills caterpillars of moths and butterflies. Bt will not contaminate groundwater because it degrades rapidly and becomes a natural component of the soil. And it is effective. When a caterpillar eats Bt, it will stop eating within hours and will die in two to five days.